Home / 65,128.19-89,862.35-39,647.88

Finding the Fourth Proportional to 65,128.19, 89,862.35 and 39,647.88

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Solution

The fourth proportional to 65,128.19, 89,862.35 and 39,647.88 is: 54,705.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,128.19 : 89,862.35 = 39,647.88 : x
  2. Step 2: Convert to fraction form
    65,128.19/89,862.35 = 39,647.88/x
  3. Step 3: Cross multiply
    65,128.19x = 89,862.35 × 39,647.88
  4. Step 4: Simplify right side
    65,128.19x = 3,562,851,471.08
  5. Step 5: Solve for x
    x = 3,562,851,471.08/65,128.19
  6. Step 6: Final answer
    x = 54,705.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.